> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hyperlane.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Overrides

Interchain Accounts allow developers to override the default chains and security models configured in the `InterchainAccountRouter`.

These are useful for:

* Calling an ICA on chains not configured in `InterchainAccountRouter`.
* Using different ISM than the defaults configured in the `InterchainAccountRouter`
* Adjusting the gas limit for IGP payments or setting other parameters.

## Interface

The `callRemoteWithOverrides` function looks similar to the `callRemote` function, but takes three additional arguments.

First, developers can override `_router`, the address of the `InterchainAccountRouter` on the remote chain. This allows developers to control an ICA on remote chains that have not been configured on the local `InterchainAccountRouter`.

Second, developers can override `_ism`, the address of the remote interchain security module (ISM) used to secure their ICA. This ISM will be used to verify the interchain messages passed between the local and remote `InterchainAccountRouters`. This allows developers to use a custom security model that best suits their needs.

Third, developers can override `_hookMetadata`, the [StandardHookMetadata](/docs/reference/developer-tools/libraries/hookmetadata) metadata passed to the message hooks for each ICA call (for example, overriding the gas limit for the IGP payment).

```solidity theme={null}
    /**
     * @notice Dispatches a sequence of remote calls to be made by an owner's
     * interchain account on the destination domain
     * @dev Recommend using CallLib.build to format the interchain calls
     * @param _destination The remote domain of the chain to make calls on
     * @param _router The remote router address
     * @param _ism The remote ISM address
     * @param _calls The sequence of calls to make
     * @param _hookMetadata The hook metadata to override with for the hook set by the owner
     * @return The Hyperlane message ID
     */
    function callRemoteWithOverrides(
        uint32 _destination,
        bytes32 _router,
        bytes32 _ism,
        CallLib.Call[] calldata _calls,
        bytes memory _hookMetadata
    ) public payable returns (bytes32)

    function getRemoteInterchainAccount(
        address _owner,
        address _router,
        address _ism
    ) public view returns (address)
```